ICU 71.1 71.1

chariter.h
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1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 ********************************************************************
5 *
6 * Copyright (C) 1997-2011, International Business Machines
7 * Corporation and others. All Rights Reserved.
8 *
9 ********************************************************************
10 */
11
12 #ifndef CHARITER_H
13 #define CHARITER_H
14
15 #include "unicode/utypes.h"
16
17 #if U_SHOW_CPLUSPLUS_API
18
19 #include "unicode/uobject.h"
20 #include "unicode/unistr.h"
26 U_NAMESPACE_BEGIN
94 class U_COMMON_API ForwardCharacterIterator : public UObject {
95 public:
101 enum { DONE = 0xffff };
102
107 virtual ~ForwardCharacterIterator();
108
117 virtual bool operator==(const ForwardCharacterIterator& that) const = 0;
118
129 inline bool operator!=(const ForwardCharacterIterator& that) const;
130
136 virtual int32_t hashCode(void) const = 0;
137
145 virtual UClassID getDynamicClassID(void) const override = 0;
146
155 virtual char16_t nextPostInc(void) = 0;
156
165 virtual UChar32 next32PostInc(void) = 0;
166
176 virtual UBool hasNext() = 0;
177
178 protected:
180 ForwardCharacterIterator();
181
183 ForwardCharacterIterator(const ForwardCharacterIterator &other);
184
189 ForwardCharacterIterator &operator=(const ForwardCharacterIterator&) { return *this; }
190 };
191
361 class U_COMMON_API CharacterIterator : public ForwardCharacterIterator {
362 public:
367 enum EOrigin { kStart, kCurrent, kEnd };
368
373 virtual ~CharacterIterator();
374
383 virtual CharacterIterator* clone() const = 0;
384
392 virtual char16_t first(void) = 0;
393
402 virtual char16_t firstPostInc(void);
403
413 virtual UChar32 first32(void) = 0;
414
423 virtual UChar32 first32PostInc(void);
424
432 inline int32_t setToStart();
433
441 virtual char16_t last(void) = 0;
442
450 virtual UChar32 last32(void) = 0;
451
459 inline int32_t setToEnd();
460
469 virtual char16_t setIndex(int32_t position) = 0;
470
482 virtual UChar32 setIndex32(int32_t position) = 0;
483
489 virtual char16_t current(void) const = 0;
490
496 virtual UChar32 current32(void) const = 0;
497
505 virtual char16_t next(void) = 0;
506
517 virtual UChar32 next32(void) = 0;
518
526 virtual char16_t previous(void) = 0;
527
535 virtual UChar32 previous32(void) = 0;
536
546 virtual UBool hasPrevious() = 0;
547
558 inline int32_t startIndex(void) const;
559
569 inline int32_t endIndex(void) const;
570
579 inline int32_t getIndex(void) const;
580
587 inline int32_t getLength() const;
588
600 virtual int32_t move(int32_t delta, EOrigin origin) = 0;
601
613 #ifdef move32
614 // One of the system headers right now is sometimes defining a conflicting macro we don't use
615 #undef move32
616 #endif
617 virtual int32_t move32(int32_t delta, EOrigin origin) = 0;
618
625 virtual void getText(UnicodeString& result) = 0;
626
627 protected:
632 CharacterIterator();
633
638 CharacterIterator(int32_t length);
639
644 CharacterIterator(int32_t length, int32_t position);
645
650 CharacterIterator(int32_t length, int32_t textBegin, int32_t textEnd, int32_t position);
651
658 CharacterIterator(const CharacterIterator &that);
659
667 CharacterIterator &operator=(const CharacterIterator &that);
668
674 int32_t textLength;
675
680 int32_t pos;
681
686 int32_t begin;
687
692 int32_t end;
693 };
694
695 inline bool
696 ForwardCharacterIterator::operator!=(const ForwardCharacterIterator& that) const {
697 return !operator==(that);
698 }
699
700 inline int32_t
701 CharacterIterator::setToStart() {
702 return move(0, kStart);
703 }
704
705 inline int32_t
706 CharacterIterator::setToEnd() {
707 return move(0, kEnd);
708 }
709
710 inline int32_t
711 CharacterIterator::startIndex(void) const {
712 return begin;
713 }
714
715 inline int32_t
716 CharacterIterator::endIndex(void) const {
717 return end;
718 }
719
720 inline int32_t
721 CharacterIterator::getIndex(void) const {
722 return pos;
723 }
724
725 inline int32_t
726 CharacterIterator::getLength(void) const {
727 return textLength;
728 }
729
730 U_NAMESPACE_END
731
732 #endif /* U_SHOW_CPLUSPLUS_API */
733
734 #endif
icu::CharacterIterator::textLength
int32_t textLength
Base class text length field.
Definition: chariter.h:674
icu::CharacterIterator::begin
int32_t begin
Base class field for the start of the iteration range.
Definition: chariter.h:686
utypes.h
Basic definitions for ICU, for both C and C++ APIs.
icu::CharacterIterator::pos
int32_t pos
Base class field for the current position.
Definition: chariter.h:680
UBool
int8_t UBool
The ICU boolean type, a signed-byte integer.
Definition: umachine.h:269
icu::operator==
U_EXPORT UBool operator==(const StringPiece &x, const StringPiece &y)
Global operator == for StringPiece.
U_COMMON_API
#define U_COMMON_API
Definition: utypes.h:300
icu::ForwardCharacterIterator::operator=
ForwardCharacterIterator & operator=(const ForwardCharacterIterator &)
Assignment operator to be overridden in the implementing class.
Definition: chariter.h:189
icu::UnicodeString
UnicodeString is a string class that stores Unicode characters directly and provides similar function...
Definition: unistr.h:295
UChar32
int32_t UChar32
Define UChar32 as a type for single Unicode code points.
Definition: umachine.h:467
icu::UObject
UObject is the common ICU "boilerplate" class.
Definition: uobject.h:223
UClassID
void * UClassID
UClassID is used to identify classes without using the compiler's RTTI.
Definition: uobject.h:96
icu::UObject::getDynamicClassID
virtual UClassID getDynamicClassID() const
ICU4C "poor man's RTTI", returns a UClassID for the actual ICU class.
icu::ForwardCharacterIterator
Abstract class that defines an API for forward-only iteration on text objects.
Definition: chariter.h:94
icu::CharacterIterator::EOrigin
EOrigin
Origin enumeration for the move() and move32() functions.
Definition: chariter.h:367
icu::CharacterIterator
Abstract class that defines an API for iteration on text objects.
Definition: chariter.h:361
icu::operator!=
bool operator!=(const StringPiece &x, const StringPiece &y)
Global operator != for StringPiece.
Definition: stringpiece.h:335
uobject.h
C++ API: Common ICU base class UObject.
unistr.h
C++ API: Unicode String.
icu::CharacterIterator::end
int32_t end
Base class field for the end of the iteration range.
Definition: chariter.h:692